Bernadotte Sandstone Member of Tradewater Formation of Raccoon Creek Group (IL-local)
Middle Pennsylvanian (Atokan)
Type section: road and ravine just southwest of Bernadotte, in SW/4 sec. 19, T. 5 N., R. 2 E., Vermont quadrangle, Fulton Co., northern IL (Wanless, 1957; see also Kosanke and others, 1960).
Illinois basin
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